{"product_id":"syston-18-4-plenum-rated-shielded-control-cable-cmp-cl3p","title":"SYSTON 18\/4 Plenum-Rated Shielded Control Cable - CMP CL3P","description":"\u003cp\u003eIn this review the SYSTON 18\/4 plenum-rated control cable is evaluated as a practical choice for professionals and DIYers who need a reliable, low-voltage multi-conductor cable for fire alarm, security, and communication circuits. The single biggest reason to buy is its combination of stranded pure copper conductors with aluminum foil shielding and a CMP flame-retardant jacket, which together deliver durable conductivity and protection against electromagnetic interference in sensitive installations. For anyone installing wiring in ceiling plenums or running low-voltage control lines near other electrical systems, this cable is designed to meet those needs.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlenum-Rated CMP\/CL3P:\u003c\/strong\u003e The CMP flame retardant jacket is suitable for plenum air spaces and provides a higher safety margin than standard riser or general-purpose cable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStranded 100% Copper Conductors:\u003c\/strong\u003e Stranded bare copper conductors give consistent conductivity and flexibility for easier routing and reliable signal transfer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminum Foil Shielding:\u003c\/strong\u003e The foil shield reduces electromagnetic interference so audio, alarm and communication signals remain clear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e300V, CL3 Power-Limited Rating:\u003c\/strong\u003e A 300V rating and CL3 designation make it appropriate for thermostats, security systems and other low-voltage power-limited circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUV Resistant Jacket:\u003c\/strong\u003e UV resistance is useful for exposed runs in certain indoor\/outdoor transition zones where sunlight exposure may occur.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple Applications:\u003c\/strong\u003e Intended for fire alarm, burglar alarm, public address, intercoms, telephone stations and access control installations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis cable is best for electrical contractors, security system installers, and facility maintenance teams who must run low-voltage control wiring through plenum spaces or alongside other services and need a shielded, flexible conductor. The plenum rating and shielding make it especially appropriate for commercial buildings, data closets and areas where air handling pathways are used.\u003c\/p\u003e\n\u003cp\u003eIt may be less appropriate for heavy power distribution or high-voltage uses beyond CL3 power-limited circuits, or for projects that require armored or direct-burial cable. Those needing thicker conductors for high-current loads should look at power-specific cable types instead.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGood conductivity and flexibility from stranded pure copper conductors, making installation easier in tight runs.\u003c\/li\u003e\n\u003cli\u003eEffective aluminum foil shielding that customers report helps maintain clear signals and reduces interference.\u003c\/li\u003e\n\u003cli\u003ePlenum-rated CMP jacket provides higher flame retardancy for ceiling and air-handling spaces.\u003c\/li\u003e\n\u003cli\u003e300V CL3 rating covers common low-voltage control and alarm applications while remaining power-limited.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome customers describe the cable as relatively thin, which may feel less robust for certain handling conditions.\u003c\/li\u003e\n\u003cli\u003eThe shielded foil construction can be slightly more difficult to terminate than unshielded cable for inexperienced installers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eConductor\u003c\/td\u003e\n\u003ctd\u003eStranded bare copper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCount\u003c\/td\u003e\n\u003ctd\u003e18\/4 (18 AWG, 4 conductors)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShielding\u003c\/td\u003e\n\u003ctd\u003eAluminum foil shield\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRating\u003c\/td\u003e\n\u003ctd\u003eCMP \/ CL3P, 300V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eFire alarm, security, intercom, PA, telephone, access control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJacket\u003c\/td\u003e\n\u003ctd\u003ePlenum-rated, UV resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe SYSTON 18\/4 plenum-rated shielded control cable is a practical, cost-effective option for low-voltage control and communication wiring in commercial and institutional settings. Its stranded copper conductors, aluminum foil shielding and CMP jacket offer a reliable combination of conductivity, interference protection and fire safety for plenum runs, making it good value for installers who need a flexible, code-compliant cable for alarm and communication systems.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this cable suitable for plenum air spaces?\u003c\/strong\u003e\u003cbr\u003eYes, it is CMP plenum-rated and designed for use in plenum spaces such as ceiling air-handling pathways.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be used for outdoor runs?\u003c\/strong\u003e\u003cbr\u003eThe jacket is UV resistant for some exposed conditions, but it is primarily intended for indoor and plenum-rated installations; use outdoor-specific rated cable for direct burial or prolonged outdoor exposure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the foil shield reduce interference for audio and alarm signals?\u003c\/strong\u003e\u003cbr\u003eYes, the aluminum foil shield helps block electromagnetic interference and customers report improved signal clarity in sensitive applications.\u003c\/p\u003e","brand":"Syston Cable Technology","offers":[{"title":"Default Title","offer_id":48632123654363,"sku":"B0BZT991SR","price":151.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61ogxP8G23L._SL1500_f05343ef-76fa-4ef9-ad2c-46e08ac691e8.jpg?v=1778445253","url":"https:\/\/gearmusthave.com\/products\/syston-18-4-plenum-rated-shielded-control-cable-cmp-cl3p","provider":"GearMustHave","version":"1.0","type":"link"}